/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.forum.forum;

import com.blandware.atleap.common.ForumModuleConstants;
import com.blandware.atleap.common.util.PartialCollection;
import com.blandware.atleap.common.util.QueryInfo;
import com.blandware.atleap.model.forum.Forum;
import com.blandware.atleap.model.forum.Post;
import com.blandware.atleap.search.SearchManager;
import com.blandware.atleap.service.exception.BeanAlreadyExistsException;
import com.blandware.atleap.service.forum.ForumManager;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.forum.ForumForm;
import com.blandware.atleap.webapp.util.core.CacheUtil;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.springframework.orm.ObjectOptimisticLockingFailureException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * <p>Makes forum active or not active.</p>
 * <p><a href="ChangeForumActivityAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.3 $ $Date: 2008/04/29 17:51:50 $
 * @struts.action path="/forum/forum/changeActivity"
 * name="forumForm"
 * scope="request"
 * validate="false"
 * roles="forum-forum-changeActivity"
 * @struts.action-forward name="listForums"
 * path="/forum/forum/list.do"
 * redirect="true"
 * @struts.action-forward name="unsatisfiable"
 * path="/forum/forum/list.do"
 */
public final class ChangeForumActivityAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		ForumForm forumForm = (ForumForm) form;

		Long forumId = null;
		if ( !GenericValidator.isBlankOrNull(forumForm.getId()) ) {
			forumId = Long.valueOf(forumForm.getId());
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing forum ID. Returning to list.");
			}
			return mapping.findForward("listForums");
		}

		ForumManager forumManager = (ForumManager) getBean(ForumModuleConstants.FORUM_MANAGER_BEAN);
		Forum forum = forumManager.retrieveForum(forumId);

		if ( forum == null ) {
			// forum not found. it might be deleted by someone else
			ActionMessages errors = new ActionMessages();
			errors.add("forumNotFound", new ActionMessage("forum.forum.errors.notFound"));
			saveErrors(request, errors);
			return mapping.findForward("listTestimonials");
		}

		String mode = request.getParameter("mode");
		boolean alreadyActive = forum.getActive() != null ? forum.getActive().booleanValue() : false;
		boolean active = true;
		if ( !"active".equalsIgnoreCase(mode) ) {
			active = false;
		}

		try {

			if ( (alreadyActive && !active) || (!alreadyActive && active) ) {
				forum.setActive(Boolean.valueOf(active));
				forumManager.updateForum(forum);

				SearchManager searchManager = SearchManager.getInstance(request.getSession().getServletContext());
				searchManager.unIndexPage(forum.getUri(), request);

				if ( active ) {
					searchManager.indexPage(forum, request);
				}

				CacheUtil cacheUtil = CacheUtil.getInstance(request);
				cacheUtil.flushLocalizableFieldValueCache(forumId);

                QueryInfo queryInfo = new QueryInfo();
                Map queryParameters = new HashMap();
                queryParameters.put("topicId", null);
                queryInfo.setQueryParameters(queryParameters);
                queryInfo.setWhereClause(" (post.topic.forum.id = " + forum.getId() + ") ");
                PartialCollection posts = forumManager.listPosts(queryInfo);
                for (Iterator i = posts.iterator(); i.hasNext(); ) {
                    Post post = (Post) i.next();
                    boolean postAlreadyActive = post.getActive() != null ? post.getActive().booleanValue() : false;
                    if ( (postAlreadyActive && !active) || (!postAlreadyActive && active) ) {
                        post.setActive(Boolean.valueOf(active));
                        forumManager.updatePost(post);

				        searchManager.unIndexPage(post.getUri(), request);
                        if ( active ) {
                            searchManager.indexPage(post, request);
                        }

                        cacheUtil.flushLocalizableFieldValueCache(post.getId());
                    }
                }
			}
		} catch ( BeanAlreadyExistsException e ) {
			// forum already exists: will never be reached in our case
			ActionMessages errors = new ActionMessages();
			errors.add("forumAlreadyExists", new ActionMessage("forum.forum.errors.AlreadyExists"));
			saveErrors(request, errors);
			return mapping.findForward("listForums");
		} catch ( ObjectOptimisticLockingFailureException e ) {
			// forum item was updated or deleted by another transaction
			ActionMessages errors = new ActionMessages();
			errors.add("updateFailed", new ActionMessage("forum.forum.errors.updateFailed"));
			saveErrors(request, errors);
			return mapping.findForward("listForums");
		}
		return mapping.findForward("listForums");
	}
}
